DCS VS PLC comparison

DCS VS PLC comparison contains detailed comparison of DCS (Distributed Control System) and PLC (Programmable Logic Controller) in following prospectus

1. Response Time
2. Scalability 
3. Redundancy
4. Complexity
5. Frequent Process Change
6. Operation
7. Supplier

1. Response Time

PLC is 10 times faster than DCS in Interlock application, Emergency shutdown. 

2. Scalability

PLC contains less modules than DCS system. 

DCS can be install several 1000s IO (Input /Output) Modules 

PLC is more suitable for Small Batch Process Plant 

DCS operating system is better in Large Continuous plants

3. Redundancy

Redundancy means IO Module working with minimum faults. Less Problems occur in DCS. 

4. Complexity

DCS has more capability to adapt Latest equipments / Instruments and Inventions. 

5. Frequent Process Changes

If Process Changes happening in Plant then DCS is more easy to get change. 

PLC Flow Charts ( Sequence) can not easily changed. 

6. Operation 

PLC is working Fast in Small to medium scale plants. 

DCS is good for Large scale continues plants.

7. Supplier

PLC is a registered trademark of ROCKWELL AUTOMATION and ALLEN BREADLY Company 

DCS is supplied by

Yokogawa 

Emersion 

Honeywell 

Foxboro

ABBA

Siemens 

Metso

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Wikipedia -
Read on Inst tools
Read on Motion control

Thanks for reading - DCS VS PLC comparison
Naitik Patel
Industrial Guide

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